Color filter plate and thin film transistor plate for liquid crystal display, and methods for fabricating the plates

• US 7,742,130 B2
• Filed: 09/29/2008
• Issued: 06/22/2010
• Est. Priority Date: 08/30/2001
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Dong-Gyu
• Primary Examiner(s): Nguyen; Dung T.
• Application Number:
  US12/240,700
• Publication Number:
  US 20090027601A1
• Time in Patent Office: 631 Days
• Field of Search: 349106-109
• US Class Current: 349/106
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate

Abstract

A color filter substrate for a liquid crystal display includes a substrate, a black matrix formed on the substrate, and a plurality of color filters formed on the substrate with the black matrix. Each color filter has a flat central portion, and a peripheral portion placed on the black matrix with a thickness smaller than the central portion. A common electrode is formed on the plurality of color filters. A thin film transistor array substrate for the liquid crystal display includes a substrate, a plurality of gate lines formed on the substrate, a plurality of data lines crossing over the gate lines while defining pixel regions, a thin film transistor formed at each pixel region, and a plurality of color filters. Each color filter has a flat central portion, and a peripheral portion placed on the data lines with a thickness smaller than the central portion. Contact holes expose the drain electrodes, and pixel electrodes are connected to the drain electrodes through the contact holes.

Claims

1. A liquid crystal display, comprising:

a substrate;

a plurality of gate lines formed on the substrate;

a plurality of data lines crossing over the gate lines;

a plurality of pixel regions defined by the plurality of gate lines and the plurality of data lines;

a thin film transistor formed at each pixel region;

a plurality of color filters, each color filter having a flat central portion and a peripheral portion placed on the data lines and thinner than the central portion;

a plurality of contact holes formed in the plurality of color filters for exposing the drain electrodes; and

a plurality of pixel electrodes connected to the drain electrodes through the contact holes.

2. The liquid crystal display of claim 1, wherein the plurality of color filters comprise a first color filter and a second color filter neighboring and overlapping the first color filter over the data lines.

3. The liquid crystal display of claim 2, wherein the peripheral portion of the second color filter overlaps the peripheral portion of the first color filter.

4. The liquid crystal display of claim 3, wherein the peripheral portion of the second color filter overlaps the peripheral portion and the central portion of the first color filter.

5. The liquid crystal display of claim 1, wherein the second color filter is spaced apart from the first color filter with a predetermined distance therebetween.